1155959 has 12 divisors (see below), whose sum is σ = 1389888. Its totient is φ = 957600.

The previous prime is 1155953. The next prime is 1155961. The reversal of 1155959 is 9595511.

It is a happy number.

It is not a de Polignac number, because 1155959 - 2⁴ = 1155943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1139 + ... + 1899.

It is an arithmetic number, because the mean of its divisors is an integer number (115824).

2^1155959 is an apocalyptic number.

1155959 is a deficient number, since it is larger than the sum of its proper divisors (233929).

1155959 is an equidigital number, since it uses as much as digits as its factorization.

1155959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806 (or 799 counting only the distinct ones).

The product of its digits is 10125, while the sum is 35.

The square root of 1155959 is about 1075.1553376141. The cubic root of 1155959 is about 104.9496054467.

The spelling of 1155959 in words is "one million, one hundred fifty-five thousand, nine hundred fifty-nine".